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			21 lines
		
	
	
		
			615 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			21 lines
		
	
	
		
			615 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
contract A {
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    fallback (bytes calldata _input) external returns (bytes memory) {
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        return _input;
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    }
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}
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contract B {
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    fallback (bytes calldata _input) external returns (bytes memory) {
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        return "xyz";
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    }
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}
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contract C is B, A {
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     function f() public returns (bool, bytes memory) {
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        (bool success, bytes memory retval) = address(this).call("abc");
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        return (success, retval);
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    }
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}
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// ====
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// EVMVersion: >=byzantium
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// ----
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// TypeError 6480: (229-420): Derived contract must override function "". Two or more base classes define function with same name and parameter types.
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